Chemical composition and mechanical properties of 16MnD5 carbon steel

Introduction to 16MnD5 carbon steel
16MnD5 medium carbon quenched and tempered steel has higher strength, toughness and hardenability than No. 45 steel. After quenching and tempering, it can obtain better comprehensive mechanical properties, good machining performance, but poor welding performance and low cold deformation plasticity. 16MnD5 carbon steel is generally used in the quenched and tempered state for the manufacture of parts subject to wear, such as shafts, spindles, crankshafts, splined shafts, connecting rods, universal joint shafts, meshing rods, gears, clutch discs, bolts, nuts, etc.

Chemical composition of 16MnD5 carbon steel
Silicon Si: 0.17-0.37, Manganese Mn: 0.70-1.00, Sulfur S: ≤0.035, Phosphorus P: ≤0.035, Chromium Cr: ≤0.25, Nickel Ni: ≤0.25, Copper Cu: ≤0.25

Mechanical properties of 16MnD5 carbon steel
Tensile strength σb(MPa): ≥620(63)
Yield strength σs(MPa): ≥375(38)
Elongation δ5 (%): ≥15
Area shrinkage ψ (%): ≥40
Impact energy Akv (J): ≥39
Impact toughness value αkv(J/cm2): ≥49(5)
Hardness: unheated ≤241HB, annealed steel ≤217HB

16MnD5 carbon steel is generally used in a quenched and tempered state, with a temperature range of -20 to 425, which is mainly used to replace 40Cr steel.